<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>3_函数中this指向</title>
</head>

<body>
  <script>
    function fn() {
      console.log(this);
    }
    fn() //Window

    function fn1() {
      'use strict'
      console.log(this);
    }
    fn1() //undefined
  </script>
</body>

</html>